I think the expansion of the definition of trans has had a huge impact here.
Originally, “trans” was definitively related to the act of transitioning.
Gender dysphoria (or whatever word is used to describe distress related to your sexed body) isn’t a choice.
But obviously the act of transitioning is a choice.
Unfortunately, there has been a massive blurring of the lines since then, so that “trans” seems to now be considered to be some immutable character trait, and it has been suggested that “being trans” is as unchangable as being gay.
Confusion has been observed however, in people who transitioned and then went on to develop dementia. There is some suggestion that those who have medically transitioned sometimes forget their chosen “gender identity” and become distressed by seeing the wrong anatomy and by wearing clothes they see as being for the inappropriate sex. This suggests to me that “being trans”, unlike sexual orientation, is not something so innate that it survives the confusion of dementia, but is more likely a conscious choice that is taken to alleviate some type of distress or for other reasons that are discussed less.
That doesn’t make it wrong to transition. But I don’t think “being trans” is a definitive state. My personal suspicion is that the internal feeling of “being trans” is a descriptive name given to all kinds of diverse feelings surrounding a sexed body that, for whatever reason, the affected person would like to change or deny.